Geodesic
Variational formulation in the analysis of finite elastic-plastic deformation
Theoretical and applied mechanics, Tome 11 (1985) no. 1, p. 93 .

Voir la notice de l'article provenant de la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts

In order to determine the history of the distribution of the stress and deformation state in the process of elasto-plastic deformation, it is necessary to perform integration over time during the entire deformation process. This can be achieved after formulating a suitable variational principle that is valid under conditions of finite deformations, and in which a constitutive law of incremental type for elasto-plastic deformation is incorporated. The finite element method is then the most suitable for determining the numerical solution of specific problems. Bearing the above in mind, in this work a potential function with a corresponding variational integral was derived for the case of isothermal and isotropic, time-independent elasto-plastic deformation. 
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     author = {Vlado Lubarda},
     title = {Variational formulation in the analysis of finite elastic-plastic deformation},
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     number = {1},
     year = {1985},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAM_1985_11_1_a8/}
}
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Vlado Lubarda. Variational formulation in the analysis of finite elastic-plastic deformation. Theoretical and applied mechanics, Tome 11 (1985) no. 1, p. 93 . http://geodesic.mathdoc.fr/item/TAM_1985_11_1_a8/